Service manual

LC-60LE631M/X-WH
6 – 1
CHAPTER 6. TROUBLESHOOTING
TABLE
[1] TROUBLESHOOTING TABLE
No power (front LED failure to light up) or no startup (front LED failure to turn from red to green)
eRON?tesehtotdetcennocylthgitgulpdrocCAehtsI connect the AC cord tightly and turn on the power again.
YES
Is the output voltage at pin (9) of P9601 (BU+5V line) as speci-
fied?
Is the output voltage at pin (17), (18), (19) and (20) of P9601
(13V line) as specified?
NO Replace the power unit.
YES
Are the wire harnesses and other cables properly connected in
the set?
NO Reconnect the wire harnesses and other cables properly in the
set.
YES
Is there the AC_DET and PNL_ON signal input at pins (11) and
(10) of P9601?
NO Check the AC_DET signal line PNL_ON signal line.
YES
Are the DC/DC converter outputs and the output voltages along
the control lines as specified?
NO Check the DC/DC converters and the control lines. Replace
defective parts as required.
1) B1.26V (IC9604)
2) B5.6V (IC9602)
3) BU3.3V (IC9601)
4) D3.3V (IC9606)
5) B5V (IC9611)
6) B1.8V (IC9610)
7) AU3.3V (IC9603)
8) AU1.8V (IC9607)
With [RF] signal input No video onscreen (1)
No video in the UHF/VHF reception
Is there IF output from the tuner pin(12) of TU1103 as specified?
Is there VIDEO output from the tuner pin(16) of TU1103 as speci-
fied?
NO
Check TU1103 and its peripheral circuits.
YES
Is there VIDEO input at pin (M3) of IC .3033CI&3011UTneewtebtiucricehtkcehCON?3033
YES
Are there the signal outputs at pin AC (21), (22), (23), (24), AD
(21), (22), (23), (24) and AE (21), (22), (23), (24) of IC3303?
NO Check IC3303 and its peripheral circuit.
YES
Check LVDS cable, LCD controller (incl. panel) and their periph-
eral circuits.